For an “Order of Placing Branches in the Home”, see Catholic Household Book of Blessings and Prayers, no. 108-109.
There are three forms of beginning the liturgy on this day:
1) the Procession or
2) the Solemn Entrance before the principal Mass, or
3) the Simple Entrance before other Masses. The Solemn Entrance, but not the Procession, may be repeated before other Masses. The penitential rite is omitted in Masses beginning with the Procession or the Solemn Entrance (Palm Sunday 1).
The proclamation of the Lord’s Passion is essential to the liturgy of this day and cannot be omitted. It may be proclaimed by three persons who take the parts of Christ, the Narrator, and the People. The part of Christ should be reserved to the priest. If the Passion is proclaimed by only one reader, then it should be proclaimed by a deacon or priest. The greeting and signing of the book are omitted (Palm Sunday 21; Paschales Solemnitatis 33).